US2052530A - Liquid measuring apparatus - Google Patents

Description

Aug. 25, 19 36. R HANDFQRD 2,052,530

LIQUID MEASURING APPARATUS Original Filed July 25, 1951 6 Sheets-Sheet 1 Aug. 25, 1936. R. E. HANDFORD 2,052,530

LIQUID MEASURING APPARATUS Original Filed July 25, 1931 6 Sheets-Sheet 2 Aug. 25, 1936. R. E. HANDFORD LIQUID MEASURING APPARATUS 6 Sheets-Sheet 3 Original Filed July 25, 1931 l/ Ill/l 25, 9 I R. E. HANDFORD' 2,052,530

' LIQUID MEASURING APPARATUS Original Filed July 25, 1931 6 Sheets-Sheet 5 Aug. 25, 1936. R. E. HANDFORD 2,052,530 YLIQUID MEASURING APPARATUS Original Filed July 25, 1931 6 Sheets-Sheet 6 FIG. 16.

INVENTOR REUBEN E. HANDFOVRDQ Patented Aug. 25, 1936 PATENT OFFICE LIQUD) MEASURING APPARATUS Reuben Ernest Handford, Luton, England, assignor, by mesne assignments, to L. N. S. Corporation, New York, N. Y., a corporation of Delaware ApplicationJuly 25, 1931, Serial No. 553,224. Blenewed February 15, 1935.

September 23, 1930 In Great Britain is Claims. (01. 221-101 pensed, of a pump for dispensing liquid through One feature of this invention relates is liquid measuring apparatus and more particularly to apparatus for the retail sale of petrol and the like, and has for its object to provide means actuated automatically by the liquid flow responsive device of a petrol or like meter for cutting oil the supply of liquid to be measured when the exact quantity required has been delivered.

According to this feature of the invention means for cutting off the supply of liquid comprises a self-closing cock which is held open for the delivery of liquid by two detent mechanisms and the detent mechanism which determines the exact time of cut-off is adapted to be released each time the smallest quantity of liquid to be measured has. passed and the detent mechanism which determined the approximate time of cut-ofl is adapted to be released just before the required multiple of the said smallest quantity has passed.

Preferably means are also provided whereby a readily observable indication is given to a purchaser that the correct quantity of liquid has been delivered. I

To this end the invention includes the provisions of means to insure that the observable indication is accurate and solely dependent upon the amount of liquid dispensed in a given transaction without being subject to manipulation by an operator to present a false indication.

The invention seeks to provide in a liquid dispensing apparatus the combination of a meter having mechanism for resetting the meter to zero position, means for delivering liquid through the meter, valve means for controlling the flow of liquid, actuating means for opening and closingthe valve means, said resetting means and actuating means being interconnected to prevent operation of the actuating means to open said valve means after completion of a liquid delivery until the resetting .means has been actuated to reset the meter to zero.

A further object resides'in providing in a liquid dispensing apparatus the combination with a meter for measuring the volume ofv liquid dis- .detail views. wariable velocity ratio mechanism constructed said meter; means for indicating the volume of liquid thus dispensed at each dispensing operation; a valve operatively connected in series with said pump; means for controlling the operation of said valve; set-back mechanism for restoring said indicating mechanism to zero position; and means operatively connecting said set-back mechanism with said controlling means whereby said valve is held closed after each dispensing operation until the indicating mechanism is set back to zero position.

Another object is to provide a liquid dispensing system. including flow establishing means, valve means controlling the flow of liquid, means for holding the valve means in open position, means for holding the valve-means in closed position, a liquid meter for measuring the dispensed liquid, an indicator driven by said meter and having a predetermined initial position, and means to prevent opening the valve means when said indicator is in other than initial position.

Other objects and advantages which are embraced within this invention will be apparent from the sequent description and appended 'of the invention a variable velocity ratio device comprises a coned member, a disc whose periphery engages the surface thereof, means .for causing relative axial movement between the coned memher and. the disc to enable the velocity ratio to be varied, and means for mounting the coned memher and disc in such relationship to each other that the tangential driving force between the coned member and the disc tends to move them bodily relatively to oneanother to increase the radial pressure between them.

Preferably two discs are employed and the coned member is in the form of a' double cone with the coned surfaces oppositely directed, one surface being engaged by one disc and the other by the other disc. In this construction, the discs are moved axially in opposite directions to an equal extent so that the discs are at all times symmetrical about the transverse mean centre of the double cone.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation, Flgure 2 an end elevation with a front indicator removed, Figure 3 a'fragmentary vertical section partly in elevation, Figure 4 a plan view with the front and rear covers removed, and Figures 5-13 Figures 14 and. 15 are views of a scribed as applied to the apparatus shown in Figures 1-13. Figure 16 is a view somewhat diagrammatic, showing in combination a motor, pump, valve, meter and indicator.

In the construction illustrated in Figures 1-13',

oi the accompanying drawings, the apparatus is,

arranged to deliver half gallons and any exact multiple thereof up to a maximum of twenty gallons, as determined by a pre-setting device to be described later. The detent mechanism deter mining the exact time of cut-oil. will in this case be released each time one-hall gallon has been delivered, the approximate cut-oil! detent being released when there remains about one-quarter of a gallon to be delivered to make up the required the lever is moved to actuate the cock plunger,

thus holding the cock open against the action of its spring, the detents being pivotally-mounted at The detents are provided with adjustable stops or tappets 8, 9, adapted to be engaged by cams In, H, for the release 01' the detents.

: The cam .III is arranged to be driven through gearing comprising skew gears l2, l2, from a spindle l4 driven in the manner hereinafter de-- scribed from the fluid flow responsive device of an appropriate petrol or like meter, so that the cam Ill makes one revolution for each half gallon delivered, while the other cam II is geared through reduction gearing comprising a worm and worm wheel l5, It, to the first so that the cam ll makes one complete revolution for forty revolutions of the cam Ill.

In order to enable the quantity of liquid required to be pre-set, the slow speed cam ll, associated with the approximate cut-oi! detent l, is fast with a spindle II which is driven through a ratchet wheel l8 and pawl IS, the said ratchet wheel having i'orty teeth, each corresponding to one-halt gallon. The pawl is mounted in an arm 20 which is also secured to the spindle I1 and the ratchet wheel is is secured on a hollow spindle 2i whichis fast with the wormwheel- I6 so as to be driven thereby. The spindle I1 is provided with a pre-setting pointer'22, associated with a fixed dial 23, graduated in halt gallons, and a handle 24.. Thus, when it is desiredto pre-set the meter to the quantity ordered, the handle 24 is turned in the' direction 01 the arrow in Figure 1 to set the cam in the corresponding position, the pawl is slipp g idly over the ratchet wheel II which remains stationary.

The spindle II is also provided with a worm 25 in mesh with axworm wheel 26 which is coupledto a spindle 21 through a slipping clutch comprising a blade spring 28 (Figure 8) co-opcrating with the spindle 21. Said spindle 21 is Provided with pointers 29 which move over dials 30. l

The operation 01 the parts so far described is as i'ollows:-

The setting handle 24 is turned, thereby rotating the spindle l1, arm 28 and pawl Is, the slow speed cam I l and the setting pointer 22, until the latter indicates the required amount on the indi- 2,052,530. according to one feature 01' this invention and decating dial 22. The cock lever 2 is then rocked to open the .cock and is engaged and held by the detent 6. The fiow establishing means or pump P driven by a motor M is then started by energizlng the line L and the fiow of liquid from the Pump through the meter drives the spindle I4, and hence the cams III and I I associated with the two detents 5 and 8, the cam '0 associated with the accurate cut-ofi. detent 5 rotating once tor each half gallon and the slow speed cam ll associated with the approximate cut-oil detent 0 being driven by the pawl and ratchet. wheel. It

, during this period by the accurate cutoit detent 5 until the cam is associated therewith efiects its release at the end 01 the twentieth halt gal-,

lon, whereupon the pump cock I closes under the action of its spring.

It will be seen that whereas the cam ii is dis-- placed only through a distance dependent on the quantity or liquid ordered, the. cam is moves through one complete revolution for each unit (in the present example 95 gallon) delivered and thus moves through a much greater total distance than the cam l I; thus by arrangingthe cam III to sheet the final release of the level 2, any error which there may be bears in proportion to the total distance travelled by the cam In a very much smaller value than its proportion to the travel 01' the cam II. It will of course be understood that the provision or the c'am II and its detent i is necessary to prevent the cam l0 and its detent I from releasing the lever 2 each hali' gallon delivered until the bait gallon is that required to complete the quantity ordered.

During the time liquid is being delivered the spindle ll carrying the slow speed cam gradually moves the setting pointer 22 to zero, indicating in' this position to a purchaser that the correct quan-' tity of liquid has been supplied.

The pointers 28 are zeroized by means comprising a zerozing spindle 3| provided with an actuating handle 22 and with a skew gear wheel 22 in mesh with a skew gear wheel 34 secured to the spindle 21 on which the pointers are mounted; the gear wheel 22 is connected to the spindle II by aslipping clutch comprising a pawl II and ratchet wheel 26, so that the spindle 21 can be rotated by the spindle l4 independently or the- 'ze roizing spindle II, and the zeroizing spindle is permitted to efiect the actuation of the spindle 21 while the spindle I4, and hence the worm wheel 25, is stationary by the slipping clutch 28 first described. In order to prevent the indicator pointers 29 from being moved by the zeroizing spindle 3| past the zero position, a blade spring 29' is provided to abut against a tooth 29 on a disc secured to the spindle 21.

Referring to Figure3, the cam H on the spindle ment dependent upon the quantity of fluid desired to be delivered.

In order to prevent the presetting handle II from being moved to eflect a fresh presetting operation until the pointers 29 have been zeroized. the presetting spindle is provided with a cam or projection 11 which cooperates with a disc ll on the spindle 21 in such a manner as to prevent the spindle 11 from being rotated to effect the presettinguntil a cut away part 89 on the disc 38 comes into register with the cam or projection 31. this registration being eflected only when the pointers have been returned to their zero position by the zeroizing spindle 3|. During delivery, the ratchet wheel It will drive the spindle II, the cam H, and the projection 31 still in a clockwise direction until the cam H engages and raises the detent i to release the lever 2, this action taking place just before the projection 31 engages the due 38, i. e., when the projection TI arrives at its Figure 3 position. Thus the disc 38 will not interfere with operation of the spindle i1 and the cam ll during delivery. 7

In order also to prevent the cock opening lever 2 from being moved to open the cook until the presetting pointer 22 has been moved from its zero position, the lever 2 is provided with a lug 40 which is in register with a detent lever ll pivotally mounted at 1 and urged by a spring 42 into a recess formed in awdisc l3 secured to the spindle i I. The recess registers with the lever 4| only when the presetting pointer 22 is at zero and when the pointer is moved from its zero position the disc effects the rocking oi the lever ll so that it moves out of register with the lug 4 and thus allows the lever to be moved to open the cock. The drive from the fluid flow responsive device to the spindle i1 is eflected through a gearing indicated generally by the numeral II, the drive being transmitted from the device to the gearing by a spindle 45. In order to enable a slight ad- .iustment to be made to the rate or actuation of the meter, the gearing M is variable; the gearing comprising a driving gear 46 secured to the spindie 45, and a driven gear '41, loosely mounted on the spindle, which transmits the drive to the spindle II and also to a counter mechanism denoted generally by the reference II. The drive-is transmitted from the drive gear 48 tothe driven gear I! through any one of three pairs-oi gears 49, and'Sl which are secured to spindles 52, 53, El

Irotatably mounted in a bracket 55 pivotally mounted at 58 and provided with an extension 51 having an aperture 58 by means of which the bracket can be'locked in the selected position by means of a bolt which can be sealed. The three pairsoi' gears 49, I, II are suchas to give slight- 1y flifierent ratio between the gears 48, 41 so that a fine adjustment can be made of the rate at which the meter is driven. The pair of gears 5| may for example be 'such as to give a 35% reduction to the rate and the pair of gears 41 such asto give a .35%'-increase, the pair of gears Ill being the normal driving gears.

In order to ensure that at the end of a presetting operation the pawl I! shall be in engagement with a tooth on the ratchet wheel II and thereby prevent lag or loss in pick up to the drive, the arrangement shown more particularly in figures II and I2 is employed; the arm 20 is provided with a blade spring 59 which abuts at its free end against a blade spring 60 sprung into an annular recess ii provided in the ratchet wheel ll.. Tinmwhen the spindle ll is turned topreset the meter, the arm 20 first moves relatively to the blade spring I8 until the arm moves into definite engagement therewith where upon the arm moves the spring in the recess;

duringthe time that the arm ill moves relatively to the spring 80 the blade spring 59 is compressed,

and it. at the .end of the pre-setting operation.- .the pawl is not in contact with a tooth in the ratchet wheel, the spring 59 moves the arm in the reverse direction until the pawl moves into engagement with a tooth and thereby prevents loss in pick up.

The fluid flow responsive device comprises what is commonly known, asthesemi-rotary pistontype, consisting of a piston which is recessed to-accom-' modate a dividing partition secured in a circularworking chamber, the piston moving with a semirotary movement about thepartition in a plane a at right angles to its axis; such a meter is illustrated in my co-pending application Serial No. v553,223 and in the British specification No. 213,061, and further description is therefore believed unnecessary.

Reference will now be made to Figures 14 and 15 which illustrate a variable velocity ratio device constructed according to one feature of this invention and described as applied to the liquid measuring apparatus shown in Figures 1-13. In place oi the gearing 49, 5D, and 5| illustrated in Figure 13, a spindle 62 is provided with two truncated conical members arranged base to base and formed by coned flanges on sleeves 63, M pinned to the spindle, a ring 65 provided on its periphery with gear teeth being interposed between the two members and secured thereto by a rivet 56. The spindle 62 is rotatably mounted in a bracket 61 which is pivotally mounted on bushes 6B, 69 secured respectively in a cranked arm ill and a frame II to which the arm is secured; the spindle l4 which is to be driven is mtatably mounted in the bushes I8, I! and is provided with a gear wheel 12 in mesh with the gearteeth on the ring 65 secured to the conical members.

The spindle is provided with two discs. denoted generally by'A, B which are engaged by the coned members, and it will be seen that the spindle 45. is located on that side 01' the spindle 62 which is remote from the spindle N, i. e. of the pivotal axis or the bracket 61.

The location of the pivotal axis'oi the bracket 81 in relation to the axes of the two spindle:

I! and B2 is such that the said axis is displaced in the direction 01' rotation at the ,point of contact between the discs and conical members, from a line C--D passing through the axes of the two the spindle 45 carrying the discs and a line G-H' also passing through the, pivotal axis of the bracket and the axis 01' the spindle 52 on which the coned members are mounted is approximately 10 when the disw and coned members are in engagement at the mean diameter of the coned members.

ing force exerted between themselves and the conical members, tend to move about the pivotal axis of the bracket '1 to increase the radial force urging them into contact, and by arranging the The discs a, a, will, by the tangential drivparts with the angle referred to. this tendency is utilized to obtain a maximum of grip without however, introducing the tendency to jam which would occur if the angle were very small, or the tendency to slip ii the angle were very large.

'lhedisc A is in the form of a sleeve II having a circular flange ll thereon to which is secured a ring It oi iibre or other material having-a high coeiiicient of friction, the periphery of the ring of fibre being coned to be engaged by the coned flange on the sleeve N. The second disc B is similarly constructed, 1. e. it comprises a sleeve 16, a conical flange I1 and a ring I. of flbre and the sleeve It oi the second disc is externally screw threaded to receive an internal screw thereof formed on the sleeve 13 or the first disc. The sleeve It is also screw threaded internally, the pitch of the internal threads on this sleeve being one half the pitch of the threads externally oi the sleeve. The

sleeve 13 of the first disc is connected to the third spindle 45 so that the disc can slide but is prevented from rotating relatively to the shaft: this is eiiected by pinning to the spindle I! a sleeve 19 having a projecting lug It constituting a key extending into a keyway formed internally in the sleeve.

The sleeve ll 01 the disc B is similarlyconnected to the shaft by a sleeve ll provided with .an internal keyw'ay 82 which receives a key It on the spindle I! so that this sleeve Ii can slide but is prevented irom relative rotation with respect to the spindle. This sleeve II is provided with a projection it which normally enters "any one oi a plurality of apertures in the an adjusting key for varying the velocity ratio between the discs and coned members, the easing oi the mechanism shown in Figures 143 being provided with 'an aperture to enable the adjustingkeyiobeinsertedintoadiustingpo- The extremity of the spindle I is extended beyond the bevel teeth thereon and the extended {ortlon is reduced in .diameterto enter an aperure, fli'orme'd in the spring pressed sleeve II the arrangement of the bevel teeth It onthe flange l1 and the location of the aperture 82 being such that when the reduced portion of the spindle 90 is inserted into its aperture and the spindleisrotateduthesleeve 8| isbytheinitial rotation. slid against the action of its spring I! to cause the projection II on the sleeve to move out of the apertures in the flange portion. ll of the disc, 3. This initial operation ailowsthediscBtoberotatedaswellassiidden relatively to the spindle ll and continued rotation oi the adiusting'spindle it causes the disc' to rotate whereby it is caused'to move anally with respect to the spindle on aecountot-the screwthreadsiormedinternallyonthesleeve It of the disc B and on the spindle. The rotationoi'thediscBalsocausesthediscAtomove axially with respect to the spindle I on account oi the co-operating screw threads formed-ex ternally on the sleeveportion I. of the disc B and internally on the sleeve portion "of the discA. As the pitch oithe'screwthreadson the spindle I! and internally on the sleeve portion It is one half that of the screw threads externally oi the said sleeve and internally of the sleeve portion II, it will be seen that rotation ofthediscBbytheadjustingspindle "will cause the two discs to move simultaneously and through equal distances either towards or away from oneanothersothatthe discs'areatall' times metrical about the transverse mean centre line of the coned members. The axial l0 movement oi the discs eii'ects a variation'in the velocity ratio between the discs and the coned members and hence between the spindles, which latter are allowed to accommodate themselves tothe adjusted positions of the discs by the pivll otally mounted bracket I carrying the spindle 62 on which the coned members are mounted.

Preferably there is provided a spring ill which supplements the contact pressure between the coned members and discs, the spring being an- 20 chored at one end to the bracket 01 and at the other end to the frame.

It will be seen that with the arrangement shown in Figures 14 and 15, not only is the drive eilicientb transmitted from the discs to the coned members, but that it the direction oi drive is reversed, siipvwill readily occur between the dhcs and coned members and thus vthe arrangement provides an eilectiv'e one way variable speed drive which is'c'apable oi general use. What I claim is: y

1. In an-- almaratus for delivering measured quantities oi the combination of a liquid mw cut-oil device biased to its cut-oil pomtion,

means for-retaining the cut-oi! device in its non- $5 cut-oi! position, split of elements each associ atedwithsaidretainingmeansandbeing'adapted whm both moved to operative positions to render saidretaining' means ineffective, means responsive to flow of fluid being delivered for driving one oi said elements to operative position delivery of liquid and for driv- I tities of liquid, the combination of a liquid flow cut-oi! device biased to its cut-oi! position, a pair of 'detenk for retaining the cut-oi! device in its position, a pair of elements associsive to flow of fluid being delivered for driving one of said elements to operative position cyclically during delivery of liquid and for driving the other elemmt to operative position just before the end or delivery or a predetermined quantity of liquid by the poflticn of said other element at the start of delivery, means for presettlng said last element, an indicator for indicating the quantity of liquid delivered, means for zeroizing the indicator, and means for preventing pre-aetting of the pre-setting. means until the indicator has been aeroiaed.

3. In apparatm for delivering leasured quantities oi liquid, the combination of a liquid flow cut-oil device biased to its cut-oil position, means in: retaining the cut-oi! device in its noncut-oii aosasso I A ing delivery of liquid and for driving the other element to operative position just before the end of delivery of apredetermined quantity" of liquid determined by the position of said other element at the start of delivery, means for pre-setting said last element, an indicator for indicating the I means has been pre-set.

quantity of-liquid delivered, means for zeroizing the indicator, means for preventing pro-setting of the pre-setting means until the indicator has been zeroized, and. means for preventing the cutoff device from being moved into its noncut-oft' position until the pro-setting means'has been pre-set.

4. In apparatus for delivering measured quantitles of liquid, the combination of a liquid flow cut-off device biased to its cut-off position, a pair of detents for retaining the cut-oil device in its noncut-oir position, a pair of elements associated respectively with said detents and being adapted when both moved to operative positions to render said detents inefiective,means responsive to flow of fluid being delivered for driving one of said elements to operative position cyclically during delivery oi liquid and for driving the other element to operative position just before the end of delivery of a predetermined quantity of liquid determined by the position of said other element at the start of delivery, means ior.presetting said last element, an indicator for indicating the quantity of liquid delivered, means for zeroizing the indicator, means for preventing pre-setting of the pre-setting means until the indicator has been zeroized, and means for preventing the cut-ofl' device from being moved into its noncut-ofl position until the pre-setting 5. In apparatus for delivering measuredquantities of liquid, the combination of a liquid flow cut-oil device biased to its cut-off position, a pair oi' detents for retaining the cut-ofi device in its noncut-ofi position, a pair of elements associated respectively with said detents and being adapted when both moved to operative positions to render said detents ineffective, means responsive to flow of fluid being delivered for .driving one or said elements to operative position cyclically during delivery of liquid and for driving the other element to operative position just before the end of delivery of a predetermined quantity of liquid determined by the position of said other element at the start of delivery, a pre-setting device, a pawl and ratchet device for connecting said other element to said fluid flow responsive means and to said pre-setting device, and a springinterposed between the pre-settin'g device and' the pawl and ratchet device, said spring being adapted to be stressed initially by the setting operation whereby to urge the teeth of the ratchet wheel and pawl into contact at the end of the setting operation.

6. In apparatus for delivering measured quantitles of liquid, the combination or 'a liquid flow cut-oil device biased to its cut-off position, a pair of detents for retaining the cut-off device in its noncut-oii position, a pair of elements associated respectively with said detents and being adapted to render said detents ineffective to move the liquid flow cut-off device in a single operation from its ncncut-ofl position to cut-of! position only when both are moved to operative positions, means responsive to flow of fluid being delivered for driving one of said elements to operative position cyclically during delivery of liquid and for driving the other element to operative position just before the end of delivery 01 a predetermined quantity of liquid determined by the position of said other element at the start or delivery, means for. pre-setting said last element, and a variable speed gear interposed between said fluid flow responsive driving means and said detent operating elements to permit an adjustment to 7. In apparatus for delivering measured quantitles of liquid, the combination of a liquid flow cutofi device biased to its cut-ofl position, a pair of detents for retaining the cut-off device in its noncut-off position, a pair of elements associated respectively with said detents and being adapted when both moved to operative positionsto 9 render said detents inefl'ective, means responsive to flow of fluid being delivered for driving one of said elements to operative'position cyclically during-delivery of liquid and for driving theother element to operative position just beton the end of delivery 01' a predetermined quantity of liquid determined by the position of said other element at the start of delivery, a pre-setting device, a

pawl and ratchet device for connecting said other element to said fluid flow responsive means and to said pre-setting device, a spring interposed between the pre-setting device and the pawl and ratchet device, said spring .being adapted to be stressed initially by the setting operation whereby to urge the teeth of the ratchet wheel and pawl into contact at the end of the setting operation, an indicator for indicating the quantity of liquid delivered, means for zeroizing the indicator, means for preventing pre-setting oi the presetting means until the indicator has been zeroized, and means for preventing the cut-off device from being moved into its noncut-ofl' position until the pre-setting means has been pre-set.

8. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, means movable by said metering means in proportion to the amount of liquid passed through said metering means, and means for controlling said valve means operable to open said valve only when said movable means is at a predetermined initial position. i

9. A liquid dispensing apparatus having in combination, a pump, a valve, a.meter through which liquid passes, an indicator movable by said meter in proportion to the amount of liquid passed through said. meter, means for holdingthe valve open to permit delivery oi a desired amountof liquid, means for closing the valve,

" means to return the indicator to zero, and means means through which the liquid passes, indicating means movable by said metering means in proportion to the amount of liquid passed through said metering means, valve opening means, and movable means normally preventing operation of said valve opening means except when said indicating means is in a given predetermined position.

11. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, lndicatfor releasing said preventing means and per-- mitting operation of said valve opening means.

12. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount 01' liquid passed through said metering means, means for restoring said indicator to zero, means for limiting the amount of liquid delivered for a single opening of said valve means, means for closing said valve, means for normally preventing the reopening of said valve means, and means operable only when said indicating means has been restored to zero for releasing said preventing means'and permitting opening said valve means. 1

13. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount 01' liquid passed through said metering means, a lever for actuating said valve means, means for latching said lever in valve open position, means to release said latching means to close said valve, and means to prevent moving said valve actuating lever to valve open position except when said indicating means is in a given predetermined position.

14. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount of liquid passed through said metering means, a lever for actuating said valve means, means for latching said lever in valve open position, means to release said latching means to close said valve, means to latch said lever in valve closed position, and means to release said last mentioned latch means only when the indicator has been restored to a given predeterminedposition. v

15. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount of liquid passed through said metering means, a lever for actuating said valve means, means forlatching said lever in valve open position, means to release said latching means to close, said valve when a predetermined amount of liquid has been delivered, means to latch said lever in valve closed position, and means to release said last mentioned latch means only when the indicator has been restored to a given predetermined position.

16. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount of liquid passed through said metering means, a lever for actuating said valve means, means for latching said lever in valve open position, means to manually release said latching means to close said valve, means to latch said lever in valve closed position, and

means to release said last mentioned latch means only when the indicator has been restored to a given predetermined position.

17. A liquid dispensing apparatus having in combination, flow establishing means, valve means controlling the flow of liquid, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount of liquid passed through said metering means, a lever for actuating said valve, means for latching said lever in valve closed position and means for releasing said latching means only when the indicating means has been restored to a given predetermined position.

18. A liquid dispensing apparatus having in combination, flow establishing means, a valve controlling the flow of liquid, metering means through which the liquid passes, an amount indicator movable by said metering means, proportional to the amount of liquid passed through the meter, means for restoring the amount indicator to zero, a predeterminer including an indicator settable according to the amount of fluid to be delivered in a given transaction driven by said meter, means for operating said valve, means preventing the movement of said operating means to open said valve except when the amount indicator has been restored to zero, means responsive to setting the predeterminer for releasing said operating means, means for latching said valve operating means in valve open position, and means for releasing said latching means to close said valve when the desired amount of liquid has been delivered,

19. A liquid dispensing apparatus having in combination, flow establishing means, a valve controlling the flow oi liquid, means to open said valve, metering means through which the liquid passes, an indicator movable by said meter from zero proportional to the amount of liquid passed through said metering means, means controlled by the indicator to operate the valve opening means only when the indicator is at zero, means to hold the valve in open position, means to close the valve, and means to hold the valve in closed position until the indicator has been restored to zero.

' 20. A liquid dispensing apparatus having in combinatiomflow establishing means,a valve controlling the flow of liquid, metering means through which the liquid passes, an amount indicator movable by said metering means proportional to the amount of fluid passed through said metering means, a predeterminer comprising means movable by said metering means proportional to I the amount or fluid passed through said metering means, means for restoring said amount indicator to zero and releasing said predeterminer, means for latching said valve in a closed position, means for resetting said predeterminer and releasing said latching means, means for opening said valve, means ior'latching said valve in open position, means operable by the predeterminer when the desired amount of liquid has passed through the metering means -to release 'said last mentioned latching means and means to close said valve.

21. In a liquid dispensing apparatus provided with a metering means, a shaft driven by said metering means ior actuatin an indicating means, a notched disk on said shaft. a second shaft driven bysaid metering means at an angle to saidflrst shaft for actuating a predeterminer, a cam on said second shaft abutting said disk when the predeterminer is in initial position and movable through said notch to set the predeterminer when the indicating means is in a given predetermined position. for delivering measured quantities of liquid the combination comprising flow establishing means, metering means through which the liquid passes, indicating means movable by said metering means away from an initial position proportional to the amount of liquid passed through said metering means, means for restoring said indicating means to initial position, a predeterminer variably settable and movable by said metering means'toward an initial position proportional to the amount oi liquid passed through said metering means, means actuated by the return of the predeterminer to initial position to prevent the flow oi liquid and means actuated with the indicating means to prevent resetting the predeterminer irom initial 22. In an apparatus position except when the indicating means has been restored to initial position.

23. In an apparatus ior delivering measured quantities of liquid the combination comprising ilow establishing means, metering means through quantities of liquid, the combination comprising which the liquid passes, indicating means movable by said metering means in proportion to the amount oi liquid passed through said metering means, means to restore said indicating means to a given predetermined position, settable means to limit the amount oi liquid delivered in a given transaction, means to preset the limiting means, and means to prevent setting the limiting means except when the indicating means has been restored to a given predetermined position. i

24. In an apparatus for delivering measured flow establishing means, metering means through which the liquid passes, indicating means movable by said metering means in proportion to the amount of liquid passed through said metering means, means for restoring. the indicating means to a predetermined position, means. variably settable according to the amount of liquid to be dispensed in a'given transaction also driven by said metering means and means cooperating with the indicating means to prevent resetting'the variably settable means except when the indicating means is in a given predetermined v position.

25. A liquid dispensing apparatus" having, in combination, liquid flow establishing means, controlling means thereior comprising means tumable about an axis. and formed with an abutment, a rotatable shaft, indicating means movable to zero upon rotation of said shaft, means face formed with a recess, a pivoted lever having a portion adapted to engage the abutmentto prevent movement oi said controlling means, and a second portion adapted to be engaged by the peripheral surface to position said lever in position to engage the abutment to prevent the establishment of flow oi liquid.

quantities of liquid, the combination of a liquid flow cut-oi! device biased to its cut-oil position, means for retaining the cut-off device in a aosauso delivery or liquid and ior llring the dispensed liquid,

carried by said shaft having a peripheral sur- 26. In apparatus for delivering measured single non-cut-oii position,a pair oi elements each associated with said retaining means and being adapted to render said retaining means ineffective to move the liquid flow cut-oi! device in a single operation from its non-cut-oii position to cut-oii position only when both are moved to operative positions, means responsive to flow oi liquid being delivered for driving one of said elements to operative position cyclically during driving the other ele-' ment to operative position lust beiore the end of delivery oi a predetermined quantity of liquid detemiined by the position of said other element at the start of delivery, and means for presetting said last element.

27. In apparatus ior delivering measured quantities of liquid,'the combination of a liquid flow cut-oil device biased to its cut-oil position, means for retaining the cut-oi! device in its noncut-oii position, a pair of elements each associated with .said retaining 4 means and being adapted to render said retaining means ineiiective to move the liquid flow cut-ofl device in asingle operation irom its non-cut-ofl position to cut-oil position only when both are moved to operative positions, means responsive to flow of liquid being delivered for driving one of said elements to operative position cyclically at the end of delivery of each unit quantity of liquid and for driving the other element to operative position just beiore predetermined number'oi units oi liquid determined by the positlon oi said other element at the start of delivery, and means'for pre-setting said last element.

28. In apparatus for delivering measured quantities of liquid, the,combination of a liquid flow cut-ofl' device biasedtoits cut-ofl position, a pair oi detents for retaining the cut-oii device in its non-cat on position, a pair of elements associated respectively with said detents and being adapted to render said detents inefl'ective to move the liquid flow cut-oi! device in a single operation from its non-cut-oii'position to cutoil position only when both are moved to operative positions, means responsive to flow of liquid being delivered ior driving one of said elements to operative position ,cyclically during delivery oi liquid and for driving the other element to operative position Just before the end of delivery of a predetermined quantity oi liquid determined bythe position of said other element at the start of delivery, and means for presetting said last element.

29. A liquid dispensing system including flow establishing means, valve means controlling the flow of liquid, means for holding the valve means inopen position, means for holding the valve means in closed position, a liquid meter for measan indicator driven by said meter and having a predetermined initial position, and means to prevent opening the valve means when said indicator is in other than initial position.

30. A liquid dispensing system including flow establishing means, va1ve.means controlling the flow of liquid, means for holding the valve means in open position, means for holding the valve means in closed position, a liquid meter for measuring the dispensed liquid, a resettable indicator driven by said meter and having a predetermined initial position, and means operated by the departure of the indicator irom initial position to'prevent opening the valve means.

31. A liquid dispensing system including flow establishing means, valve means conh'olling the flow of liquid, means for holding the valve means in open position, means for holding the valve means in closed position, a liquid meter for measuring the dispensed liquid, a resettable indicator driven by said meter and having a predetermined initial position, means for locking the valve means in closed position and means operated by the departure of the indicator from initial position for preventing displacement of the locking means until the indicator has been reset to initial position.

- means whereby the valve means is initially operable to permit the flow of fluid only when said indicating means is in a predetermined position.

33. In a fluid dispensing apparatus, in combinatlon. a dispensing line. means to establish a flow oi fluid through the line comprising a pump and a meter measuring the quantities of fluid flowing to the line,-valve means in said line adapted to permit and prevent the flow of fluid, an indicator driven by the meter and visually indicating the quantities oi fluid flowing to the line by a series or numerals in arithmetical on including aninitial positon representing the commencement oi the delivery of liquid to the line, and means for controlling the valve means whereby the valve means is initially operable to permit the flow oi. fluid only when said indicating means visually indicates said initial position.

34. In liquid delivery apparatus, the combination of a meter having mechanism for resetting the same to zero position, means for effecting liquid iiow through the meter,- valve means controlling said liquid flow, operatingmeans for said valve means, and interconnecting means between said operating means and meter resetting mechanism for insuring return oi the meter to zero position before operation of the operating means to open said valve means for starting flow produced by saidliquid flow efl'ecting means.

35. In liquid delivery apparatus, the combination of a meter havingmechanism i'or resetting the meter to zero position, means for delivering liquid through the meter, valve means for controlling the flow oi liquid, actuating means for opening and closing the valve means, said resetting means and actuating means being correlated to prevent operation of the actuating means to open said valve means after completion of a liquid delivery until actuation oi the resetting means for resetting the meter.

36. In a liquid delivery apparatus, the combination of a meter, of mechanism for resetting the meter, means for delivering liquid through the meter, valve means for controlling the flow of liquid, actuating means for opening and closing the valve means, manually actuated means for operating the resetting mechanism, and means interconnecting the manually operable means and the valve actuating means to ensure the meter being at zero position wheathe valve means is opened.

37. In a liquid dispemsing device, the combination with apump, a valve means having a manually operable control for starting and stopping the aosacso flow of liquid, a meter having mechanism operat-v ed by the flow of liquid from the pump, manually operable resetting means tor the meter, and means interengaging the means for the reset mechanism and the valve control whereby to prevent a valve opening movement of the valve control until the manual actuating of the resetting means.

38. In a liquid delivery apparatus, the combination oi a meter having resetting mechanism, a pump, a valve, manually actuated means to open and close the valve, a manual actuator for the resetting mechanism, and means cooperatively related to the resetting mechanism and a part of the valve actuating means to prevent opening movement of the valve actuating means until actuation oi the resetting means.

39. In liquid dispensing apparatus, in combination, liquid metering means, means to establish liquid flow through the metering means, valve means to control the flow of liquid, indicating means movable by the metering means from an initial position in proportion to the amount of liquid passed through the metering means, means to restore the indicating means to initial position,

and means released by the indicating means when at zero position to permit actuation of the valve means. to valve open position.

40. In liquid dispensing apparatus, the combination with a meter for measuring the volume of liquid dispensed, 01' a through said meter; means for indicating the volume of liquid thus dispensed at each dispensing operation; a valve operatively connected in series with said pump; means for controlling the operation of said valve; set-back mechanism for restoring said indicating mechanism to zero position; and means operatively connecting said setback mechanism with said controlling means whereby said valve .is held closed after each dispensing operation until the indicating mechanism is set back to zero position.

41. In liquid dispensing apparatus, the combination with a meter for measuring the volume of liquid dispensed; 01' a pump for dispensing liquid through said meter; means for indicating the volume of liquid thus dispensed at each dispensing operation; a valve cperatively connected in series with said pump; means for controlling the operation of said valve; set back mechanism i'or restoring said indicating mechanism to zero position: and means operatively connecting said set-back mechanism with said controlling means, including a cam and lever whereby said valve is held closed-after each dispensing operation until the indicating mechanism is set back to zero position.

42. In liquid dispensing apparatus, the combination with a meter for measuring the volume of liquid dispensed; of a pump for dispensing liquid through said meter; means for indicating the volume of liquid thus dispensed at each dispensing operation; a valve operatively connected in series with said pump; a lever for controlling the operation or said valve; s set-back mechanism for re storing said indicating mechanism to zero position; and means operatively connecting said set-- back mechanism with said valve controlling lever, including a locking lever and a cam in cooperative relation with said controlling lever; whereby said valve is .held closed after each dispensing operation until the indicating mechanism is set back to zero position.

43. In apparatus of the class described, a liquid deliveryconduit, a meter interposed in said .conduit, means for forcing liquid through said conpump for dispensing liquid duit and meter, a register having a movable ele- 46. In a fluid dispensing device, in combination.

ment to indicate the quantity of liquid measured a meter having a resettable indicator adapted to by said meter, driving means between said meter be actuated in response to fluid flowing through and element-including a connection enabling rethe meter, valve means controlling the flow of setting of said element without operation of the fluid through the meter, and means to' reset the 5 meter, valve means in said conduit movable back indicator and control the fluid flow in a desired and forth through a predetermined range to open sequence, said means preve ting the reopening and close said conduit, means to open and close of the valve means for restarting oi 'fluid flow said valve means, means operated with said meter through the meter. after stopping, until the indi- 10 to close said valve means and to prevent opening cator is reset. l0

said valve means until the resetting means has 47. In a fluid dispensing apparatus, the comresetthe movable element. 'bination of means for delivering fluid therefrom,

44. In a fluid dispensing device, the combinavalve means for controlling the flow of fluid, indition of a fluid delivery line, fluid forcing means eating means for determining the quantities of associated with said line, valve means in said fluid delivered, and means associated with said 5 line selectively conditionable to open and close indicating means, ior controlling saidvalvemeans, the fluid delivery line, flow responsive apparatus whereby said valve means is initially operable associated with the line, an indicator actuated by to permit the flow of fluid only when said indithe flow responsive apparatus, resetting mechaeating means is in a predetermined position,

nism for the indicator, and an operative connec- 48. In a fluid dispensing apparatus or the like, 20

tion between the indicator and the valve means the combination oi means for discharging quanwhereby the indicator must be reset before the titles of fluid, said means including a fluid meter fluid iorcing means can deliver fluid through the and a .valve, indicating means operable in acline. v 'cordance with said meter for determining the 2 45. In a fluid dispensing device, the combina quantities of fluid discharged from said apparation of a meter having a resettable indicator, tus, means for opening said valve to discharge valve means to control the flow of fluid through said. fluid. and me ior cont l d la tthe meter, and means to set the indicator to a en ion d ans whereby t e sam is initially predetermined setting before the valve means can p a e Only when S d at meme 3 in be actuated, said means cooperating with the a predetermined D valve means to prevent the restarting of fluid flow through the meter, after stopping, until the indi- REUBEN ERNEST HANDPORD. ester is reset.

CERTIFICATE or CORRECTION.-

Patent No. 2,052,550. i August 25, 193 6.

REUBEN ERNEST HANDFORD.

g It is hereby certified that error appears in the printed specification oithe above numbered patent requiring correction as follows: Page 2, second column, line '70, for the word "present" read preset; and that the .said Lettors Patent should be read with this correction therein that the same my conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of December, A. D."l.936.

, I E w A Henry van-arsdale '(Seal)- T1 Acting Commissioner of Patents.-

duit and meter, a register having a movable ele- 46. In a fluid dispensing device, in combination.

ment to indicate the quantity of liquid measured a meter having a resettable indicator adapted to by said meter, driving means between said meter be actuated in response to fluid flowing through and element-including a connection enabling rethe meter, valve means controlling the flow of setting of said element without operation of the fluid through the meter, and means to' reset the 5 meter, valve means in said conduit movable back indicator and control the fluid flow in a desired and forth through a predetermined range to open sequence, said means preve ting the reopening and close said conduit, means to open and close of the valve means for restarting oi 'fluid flow said valve means, means operated with said meter through the meter. after stopping, until the indi- 10 to close said valve means and to prevent opening cator is reset. l0

said valve means until the resetting means has 47. In a fluid dispensing apparatus, the comresetthe movable element. 'bination of means for delivering fluid therefrom,

44. In a fluid dispensing device, the combinavalve means for controlling the flow of fluid, indition of a fluid delivery line, fluid forcing means eating means for determining the quantities of associated with said line, valve means in said fluid delivered, and means associated with said 5 line selectively conditionable to open and close indicating means, ior controlling saidvalvemeans, the fluid delivery line, flow responsive apparatus whereby said valve means is initially operable associated with the line, an indicator actuated by to permit the flow of fluid only when said indithe flow responsive apparatus, resetting mechaeating means is in a predetermined position,

nism for the indicator, and an operative connec- 48. In a fluid dispensing apparatus or the like, 20

tion between the indicator and the valve means the combination oi means for discharging quanwhereby the indicator must be reset before the titles of fluid, said means including a fluid meter fluid iorcing means can deliver fluid through the and a .valve, indicating means operable in acline. v 'cordance with said meter for determining the 2 45. In a fluid dispensing device, the combina quantities of fluid discharged from said apparation of a meter having a resettable indicator, tus, means for opening said valve to discharge valve means to control the flow of fluid through said. fluid. and me ior cont l d la tthe meter, and means to set the indicator to a en ion d ans whereby t e sam is initially predetermined setting before the valve means can p a e Only when S d at meme 3 in be actuated, said means cooperating with the a predetermined D valve means to prevent the restarting of fluid flow through the meter, after stopping, until the indi- REUBEN ERNEST HANDPORD. ester is reset.

CERTIFICATE or CORRECTION.-

Patent No. 2,052,550. i August 25, 193 6.

REUBEN ERNEST HANDFORD.

g It is hereby certified that error appears in the printed specification oithe above numbered patent requiring correction as follows: Page 2, second column, line '70, for the word "present" read preset; and that the .said Lettors Patent should be read with this correction therein that the same my conform to the record of the case in the Patent Office.

Signed and sealed this 8th day of December, A. D.=l.936.

, I E w A Henry van-arsdale '(Seal)- T1 Acting Commissioner of Patents.-

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